Download the WP13F783D datasheet PDF.
This datasheet also covers the WP12M551S variant, as both devices belong to the same the 5-phase stepping set family and are provided as variant models within a single manufacturer datasheet.
Pulse I/F (AC power input) The 5-phase Stepping Set
WP1 series AC100V/230V Micro-step (500 x 1 to 250 divisions) Configuration of the 5-phase Stepping Motor Set, WP1 Series Name WP1 Series.